What does POP MART mean by hiding money?

The hidden style of POP MART refers to some special styles or characters in a series of POP MART, which are difficult to obtain or limited in number. These hidden money will attract the special attention and pursuit of toy collectors and enthusiasts. It takes some luck and experience to buy Tibetan money, because the probability that they often appear in ordinary styles is very low. POP MART is a toy company in China, which is famous for designing and manufacturing cute and unique blind box toys. Their products are usually sold in the form of blind boxes based on small animals, people and images.